Hi-tech energy saving equipments supplies motor less turbine air ventilators sizing from 12" to 36" dia as per need of area of factory shed /godown / kitchen/toilet block. Electrical power nis not used but wind energy is utilized to induce airflow by centrifugal action. Centrifugal force created by rotating vanes in turn creates low-pressure [vacuum] zone, which draws fresh air from outside, thus replacing polluted air/hot air continuously round the clock and 365 days in a year at no cost. The frp venturi dome and sheet used with turbo ventilator provides natural light during daytime, thus reducing lighting load. The 80% depreciation is available in installation of turbo ventilators and frp roof light sheets. Turbo air ventilators can be fitted on any type of gi sheets/ac sheets/kitchen or toilet block of multistoried building through pipings, etc.